Q. A bicollateral vascular bundle has the following arrangement of tissues.
A) Outer phloem $\rightarrow$ Outer xylem $\rightarrow$ Middle cambium $\rightarrow$ Inner xylem $\rightarrow$Inner phloem
B) Outer cambium $\rightarrow$ Outer phloem $\rightarrow$ Middle xylem $\rightarrow$ Inner phloem $\rightarrow$ Inner cambium
C) Outer phloem $\rightarrow$ Outer cambium $\rightarrow$ Middle xylem $\rightarrow$ Inner cambium $\rightarrow$ Inner phloem
D) Outer xylem $\rightarrow$ Outer cambium $\rightarrow$ Middle phloem $\rightarrow$ Inner cambium $\rightarrow$ Inner xylem
Explanation
In a bicollateral vascular bundle, the phloem occurs in two groups one outside the xylem and the other inner to it, i.e., two groups of phloem, one on each side of xylem. So, the correct sequence is Outer phloem $\rightarrow$ Outer Cambium $\rightarrow$ Middle xylem $\rightarrow$ Inner cambium $\rightarrow$ Inner phloem
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.